Remote code execution using web.config file.

Many time we have a file upload function but we are not able to upload our .aspx file after using all client site bypass technique.

A web.confg file is a kind of control file on that directory or you can customize the way your site behaves in that particular directory. if you create a web.config file in root directory then it will affect whole site.

This had some example code in it to actually execute code from the web.config. (Thanks Soroush!)

The <handlers accessPolicy=”Read, Script, Write”> will give the web.config file read, write permission and then we can add asp code inside the <% %> and asp code will execute on the browser then we will get the Remote code execution.

1 thought on “Remote code execution using web.config file.”

In computer security , arbitrary code execution (ACE) is used to describe an attacker’s ability to execute arbitrary commands or code on a target machine or in a target process . An arbitrary code execution vulnerability is a security flaw in software or hardware allowing arbitrary code execution. A program that is designed to exploit such a vulnerability is called an arbitrary code execution exploit . The ability to trigger arbitrary code execution over a network (especially via a wide-area network such as the Internet) is often referred to as remote code execution (RCE).
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